<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>
        body{
            font-size:100px;
        }
    </style>
    <script>
        var a = Math.random();
        if (a > 0.5) {
            document.write("天行健，君子自强不息");
        }
        else {
            document.write("地势坤，君子厚德载物");
        }
    </script>
</head>
<body>

</body>
</html>